Question: how can I find all features (tracks, trails) in a specific area with a specific tag (“access=agricultural”) and change it in a batch to “motor_vehicle=agricultural”, without doing too much manual work?
I am using OSM quite regularly and try to contribute when I find mismatch between the map and the reality. For me it’s more like giving back to the community than a proper hobby, so my experience with editing the map is limited.
I have encountered a bug now which annoys me sufficiently that I’d like to fix it, but I need some support to find a right way to address it.
There are lots of forest and field roads, at least in Germany/Bavaria, which are labeled “access=agricultural”, while they mean “motor_vehicle=agricultural”. That leads to the trails being rendered as “No access allowed” (crisscrossed red) while biking (Orux Maps, Theme:OpenAndromaps Elevate, Style: Cycling/MTB.
While it seems to me that tweaking the style to work around that bug might be an easier solution, it would just hide the problem without fixing it.
So, can someone help me to find an efficient way to fix the bug?
This will be a mechanical edit and even for things that are undisputed (and that access is wrong and it should either be vehicle or motor_vehicle is clear, differentiation depending on the relevant Bundesland) you should be adhering to https://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct except if it affects a trivial number of objects.
I would personally do any such edits with JOSM (searching and downloading the data with overpass) and in medium size batches because you will need to check what other access tags are present on the ways as individual means of transport may have been added to the ways etc.